Cena has been feuding for weeks with Bray Wyatt, but Brooklyn fans won't get to see that battle just yet.
Instead, Cena takes on Harper, who is in The Wyatt Family alongside Bray.
Besides Cena vs Harper, no other bouts have been announced for the March 24 episode of WWE Monday Night Raw.
However, the WWE did tease that Brock Lesnar would be confronting The Undertaker.
Brooklyn's WWE fans won't get to see Lesnar fight The Undertaker, since that match is slated for Wrestlemania XXX, two weeks from now in New Orleans.
While the Lesnar vs Undertaker bout doesn't actually happen tonight, they will be confronting each other with some back-and-forth verbal jabs.
Tonight's episode of WWE Monday Night Raw is also expected to feature a cameo appearance from Hollywood movie legend Arnold Schwarzenegger.
Also on the card, Daniel Bryan will look to get revenge on Triple H for the brutal beating he was given during last week's episode of WWE Monday Night Raw.
Last week on WWE Monday Night Raw, Triple H announced that the winner of his Wrestlemania XXX clash with Bryan would enter the Wrestlemania main event with Batista and Randy Orton, as part of a triple-threat match.
With that said, the WWE is hyping the Bryan vs Triple H storyline as much as possible prior to Wrestlemania XXX.
In other matters, WWE Monday Night Raw in Brooklyn might feature a tag-team bout, likely between The Real Americans and The Usos.
There may also be a divas match on tonight's WWE Monday Night Raw card. However, the WWE hasn't officially announced one.